Archived posting to the Leica Users Group, 1996/06/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Friends, I just came back from the Land of Silicon. Keeble and Shuchat had a big (31'st Anniversary Sale) and Ernst Hartmann of Leica, N.J. was there. Ernst kindly looked at my beat-up, but deadly reliable and accurate, M5 and offered to test it using an electronic gadget. My speeds were right on, except the slow ones, which I do not use at all. However, Ernst declared that my lightmeter was one stop off. This came as a surprise, because I thought it was right on, based on comparison with several other meters, including the one on the M6 and various Gossens and Pentax spot meter. Anyway, Ernst kindly adjusted it to the specification. Upon returning, I checked my M5 meter against the other meters, the M6 and the SL2. I found that the M5 meter is now one stop off, but it reads the same as that on the SL2. One stop is a lot. I believe that the difference is due to a different spectral response of the SL2 and M5, which use CdS technology. The electronic gadged used by Ernst may be too perfect and not take into account the spectral response differences between the Silicon Blue cells. I will call Ernst back with my findings as soon as he is back from vacation. Incidentally, he is a hell of a nice and competent fellow. Any opinions on this? Pax et Lux, Chris Fortunko